Riveting machinery.



M. O. JACKSON.

RIVETING MACHINERY.

APPLICATION FILED MAR. 1a, 1913.

1, 1 1 3,900. Patented 001;. 13, 1914.

6 2 SHEETS-SHEET l.

witnessea Inventor 6 5 M a-- Manet/w C (lac/won,

.fltorrggqa Patented Oct. 13, 1914. u 2 SHEBTSSHEET 2.

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' APPLICATION FILED HAR.13, 1913. 1, 1 1 3,900.

fl 6 n $7 MANETHO c. .ucxson, orwrsontwisoouept I arvs'rme nacninnag,

seams... of Letters Patent.

- Application filed lama 18, ms. semi-no. 758,970.

Patented oetiiaieia.

To-all'whom it may concern:

'Beit known that 'I', MANETHO G. .IAQK- sois, acitizenof the United States, residing at Madison, in the county of Dane andState ofWisconsin, have invented a certain new and useful Im rovement in Biveting Machinery', of which the following is a-full, clear, concise, and exact description; refer: ones being had to the accompanynigdrawinii, forming a part'of this speci-ficatlon.

y invention relates to riveting machinery and has for its oluect an improved mechanism wherebg riveting 'canbe one m a very effective an simple manner.

My invention provides mechanism whereina motor and the riveting mechanism per se is movable with respect to a table upon which the parts to be riveted are placed.

M invention provides a rivet set which is a apted to be rotated by a motor at such times when it is raised from the rivet upon which it has operated, and when the rlvet set is in actual contact with the rivet a slip friction is provided so as not to interfere with the rotation of the motor. By the use of this slip friction the rivet set may receive a rapld succession of blows without injury to the motor or the riveter parts. The rivet set is of such a construction that it engages only a part of the rivet at one time, so that there is not a great deal of power required to perform the riveting. My invention also contemplates portable riveting mechanism thus dispensing with the su orting means.

y invention will be clearly understood by referring to the accompanying drawings,

in which:

Figure 1 is a front elevational view of the mechanism embodying my invention. Fig. 2 is a view wherein the parts shown in cross section are taken on the line 2-2 of Fig. 1. Fig. 3 is a sectional view taken on line 3--3 of Fig. 2. Fi 4 is a sectional view taken on line-H 0 Fig. 2. Fig. 5 is an enlarged view of'the spring mechanism which is ash h Fig. 6 is 'a fragmentary view 5 owing t e engagement of the operating member with the plunger which is used to strike the rivet set. Fig.

7 is a modified arrangement of the rotating member showing a modified arrangement the upper bearing members. Fig. 8 is a view s owing the rivet set in section and also showing how this rivet set is advanced after it has been made tostrike the rivet.-

rangement for the en a ementfefj the rivet set with its associate "s eeve.

Referring to Fi extending upwardly from this base at each their upper ends support two guides 12-12. .These guides have operating en agement {with flat surfaces 13-13, upon t e frame 14;,wh1ch is adapted to be moved up and downg' This frame 14.has' mounted at the top thereof, 8' motor frame 15-15. At the lower'end'of-this frame there issecured a .cup member 16'. The frame 14 has at its {rear end a recess 17 which is engaged by a ibal-i 'inember'18, which ma be secured to the levers '19, ivoted at "20 to the ribs ,11'1'1'.- One 0 the 18V 8IS 19 has pivoted thereto, a rod 21, which leads downward and is pivoted at-its lower end to a foot lever-22, which is suitably ivoted to a supcured to a hoe member 24,.whichis suitably mounted upon a cross piece'25, brid mg the distance between the webmembers. Fhe purpose of this sprin is'tomaintain the motorframe 15 and t e frames 14 and 16 in their normally raised position, that is to say, this spring maintains theseparts' ;in the dotted position, as shown. At the upper ends of the ribs 11-11,' a brid member 26, is shown, which supports tee upper end of a vertical spindle 27,"-which passes through a lug 28, formed in another rid e piece 29. he sleeves 30 and; 31

end, a suitable handle, so that it may be is a part of a table 33, which is adapted to This table is provided-withenga 'ng sur ing surfaces 35, on the ri s 11 11. pposite from these operatingsurfaces are" through the table 33. This, b oped.

.1 and-e, that Mama .8, base 10, which-1s suitably supported, and

side thereof are-t'wo ribs"11- 11, whichat" port, as shown. The other ever has secured" thereto a sprin 23, which has one end se-" whic are suitably secured ,to this vertica s indle, revent lon itudinal movement t ereof. he spindle as at its uppermost rotated when desired. The lower end of 7 th s spindle is threadedinto a lug 32, which 160 be moved up and down, asoccasion requires. i

faces 34--34, which enga e vertl'ca 'o erat O .5 crating surfaces 36- 36, which aresli'ghtiy' inclined, as showmand which are adapted to be engaged by a block 3'( which has -'a' bolt '38, passing therethmughfand also i wh fl ti y means of the nut at one'clid'therqf; serves to hold theblock and table firm-yr:

EFi-g. *9 is a sectional view of afmt)lifiekjl a. I

a ainst their associated engaging surfaces. Tie table is provided at its upper end with a member 39, for engagement with the head of the rivet.

It might be well to explain now the mechanism for operating the rivet set, and m order to do this effectively, and in the most simple manner, I have showna motor. shaft 40, which extends downward and 1s splmed in a neck-portion 41,, of the rotating member This rotating member is rovided with a shoe or lug 43, which may either integral with sand member or may consist of a separate piece which may be fixedly secured to said rotating member. This rotating member has extending downward a hearing portion 44, which is supported in a sleeve 45, which is held in the frame 14, as shown. The bearing portion 44, has an opening 46, into which projects a vertical shaft 47, a connection being. madebypassing a pin 48 extending from the portlon 44, and into an elongated slot in the shaft 47. This arrangement it will be seen, provides for relative movement between the member 42 and the shaft 47. The shaft 47 has bearin engagement with the frame 14, and at the o,wer end it has bearing engagement with asleeve 49, which is suitably supported in the frame 16. The shaft 47, has providedat its lower end, a pinion 50, which is clearly shown in F lgs. 2 and 3, and which engages with a gear 51, which has extending downward therefrom a sleeve 52," this sleeve having bearing engagement with the frame 16, as shown. Extending upwardly from the gear is a cup portion 53, which serves to sup ort the lower portion of asleeve or thim le 54, this thimble having quite a long engagement, with the cup portion 53. The sleeve 54 is arranged so that it engages at its upper portion with a shoulder 55, this shoulder preventing movement in an u ward direction of this thimble. The thim le is provided with an opening 56, which admits a plunger 57,

.which is arranged to reciprocate in this opening in a manner which will be described hereafter. The plunger 57 has an enlarged portion 58 thereon, which engages the openmg 56 and is arranged to be held in its up position by means of a short spring 59, which bears against a floating sleeve member 60, this member having a neck portion which is ada ted to engage the lower portion of the p unger 57. One purpose of this member 60 is that it serves to limit the upward movement of the rivet set 62 when said member engages the sleeve 54 forming a stop therefor. Another ur ose of this member 60 is that it contro s t e position of the plunger 57 through the spring 59. As shown in the drawings, the plunger is normally in a position out of t e path of the shoe or lug 43 owing to the shortness of the spring 59. The upper portion of the plunger '57 is splined to a member 61, which is mounted in the frame 14, in order to prevent said plunger from turning.

The sleeve 52 has an opening into which the upperortion of the shank of the rivet set 62 1s a apted to engage. This r1vet set is provided with a diminished portion 63, around which engage a pair of springs '64 and 65, these springs serving to maintain the rivet set in a position such that the rivet set will have more or less loose connection upon the sleeve portion 52, and also, as will be presently described, the connection is s ch that after a blow has been struck on the r1vet set by means of the plunger 57, the

springs 64 and 65 serve to maintain sufiicient.

friction between the rivet set and the or-, tion 52 so that the rivet set is rotated a s11 ht amount and can rebound or reciprocate a er each striking operation. Rotation is produced by the enga ement of the pinion 50 and the gear 51.. The springs 64 and 65, as shown, in Figs. 1, 2 and 5, have each an upper loop 66, and the lower loop 67, which are connected by a portion 68, as. shown.-

The upper loop of each spring engages in a recess which is suitably formed in the sleeve portion 52 and has a frictional engagement therewith. The loops 67 have frictional engagement with the portion 63, so that when the rivet set is brought against the rivet and during such en agement, this rivet set will not be turned cause the friction is onl suflicient to turn the rivet set after eacr striking operation, or during the disengaged.

position.

j In one form emplo ed in my invention the rotating member 42 as engaging therewith a resilient member 69, which also engages a plate 7 O, which has bearin engagement with roller bearings 71, whic in turn engage with a suitable plate 72. Suitable ball bearings are also rovided around the uppermost portion 0 the neck 41 of the rotating member. This arrangement provides means whereby very little friction ensues during the operation of the rotatin member 42, and also provides a connection such that this rotating member is raised slightly as it strikes the end of the lunger 57 In the arrangement shown in ig. 7, the rotating member 42, is provided with a suitable raceway which engages suitable ball bearings which in turn engage a race-way engaging the motor frame 15. The member 42 has a neck portion 41 between which and the motor frame 15, there are a plurality of thrust washers 74. These washers are arranged so that they receive the thrust when the rotatin member 42 strikes the plunger 57. In this modification there is no relative movement between the motor frame and the rotating member 42, so that each .blow struck on the plunger will be sharp and decisive and not yielding, as is the case with the arnection, the vertical shaft 47 may have a fixed connection with respect to the rotating member 42.

As shown in Fig. 9, the rivet-set 62-, has a shank 75, which is splined to the. sleeve portion 52, by means of a key 76. so that there will be a continuous rotation of the rivet set,

as distinguished from the other arrange ment wherein there is only a rotationwhen the rivet set is removed from the work upon.

which it operates.

The operation-of the machine is as fol:

lows: A piece of .work such as a pair of plates are placed upon the table 33, which ma be raised to the re uired height, after whlch the nut on the ho t 38 may be tightened so as to maintain this table in a positive and fixed position. his to be under: stood of course that normally the frames 14:, 15 and. 16 are in a raised position owing to the tension of the spring 23, which maintains such parts in a normal position, and when it is desired to perform the riveting, the

foot lever 22 is pressed downward, thus causing a downward movement of the abovementioned frames against the tension of the spring 23. When the rivet set has been brought into contact with the rivet, the rivet set is forced up into engagement with the sleeve 60, and also into striking distance .with the end of the plunger 57.. This move.-

ment it will'be noted presses the enlargedportion 58 of the plunger into firm engagement with the'thimble or sleeve 54, owing to the increased tension placed in the spring 59. After the rivet set has been brought into firm engagement with the rivet by pressing the foot lever, or by hand pressure when the portable type is used, the motor is set in operation and the rotating member 42 is caused to rotate in order that the shoe or projection 43 may strike the end of the plunger 57. This plunger, as shown in Flg. 6, has an inclined surface against which the shoe strikes. -Whe1 i action takes place, the plunger is forcedfdownward compressing spring 59 and striking the rivet set, the rivet set is also forced downward in order to do the required work upon the rivet. In other words, it upsets the metal and forms a head on the rivet in. order to secure the plates or parts together. After each striking operation the spring 59 forces the plunger into its uppermostposition a ainst the neck portion provided in' the tl iimble or sleeve 54. There will not however, be any rotation of this plunger inasmuch as it is splined at its upper ortion to the sleeve 61, which is firmly held 1n position in the frame 14. Fig. 8 illustrates the end of the rivet set, this end being shown in cross-section and in dotted lines; that is to say, the full lines represent one position of the rivet set, and the dotted lines represent the position to which this rivet set has been advanced afterthe rivet. set has been struck by the. plunger. It will thus be seen that the rivet set engages but a very small portion of the. rivet at onetime so that very little power is required to upset the metaL- The rivet set is turned after each striking operation, and it makes a complete revolution in order to operate against all portions of the rivet. It will be understood, of course, that the enmay be maintained until a head hasbeen formed on the rivet. With the spring conneetion between the rivet set and the sleeve portion 52, provision is madeso as to prevent the increase of the normal load on the motor, that is, no turning action is carried on when the rivet set engages with the rivet, but only during such times when there is a rebound or when the rivet set is raised from the rivet.

The provision of the floating thimble 60 is a very important feature in that it controls the position of the plunger by means of the spring in addition to serving the purpose of preventing the rivet set from being forced into a rigid engagement with the plunger. Inother words, the rivet set is limitedin its movement in an upward direction by the engagement of the floating sleeve 60 with the sleeve 54 forming a stop. v This prevents the overloading of the motor.

It is to be understood that my invention is designed to be employed with equal facility as a stationary as well as a ortable device. When it is used as a portab e means a suitable handle can be secured to the motor frame if desired in order to aid in lifting and holding the mechanism.

What I claim is:

1. A mechanism of the class described comprising a source of power, a reciprocat-v ing element driven from said source, a tool arranged to be engaged and operated by said reciprocating element, mechanism for transmitting power from said source to rotate saidtool, and a friction clutch arranged to permit said power-transmitting mechanismasement between the rivet and the rivet set comprising: source of power, a hammer operated from said source, a tool arranged to be engaged and ofierated by said hammer, mechanism norma y adapted to turn said tool, and a friction clutch arranged to permit said mechanism to move independently of said tool when said tool is being acted upon by said reciprocating element.

3. In combination, a source of power, a reciprocating element driven from said source, a tool arranged to be engaged and operated by said reciprocating element, and mechanism for normally contlnuously rotatsaid hammer,

-to permit said collar to momentarily slip mgesaid tool arranged to permit said-tool to remain nonrotatmg while the latter is being acted upon bv said recinrocating element'.

4:.Inflcombination, a source of power, a hammer operated from said source, a tool arranged to be engaged andv operated by said hammer, and mechanism for normally continuously rotating said tool arranged to permit said tool to remain nonrotating while the latter is being acted upon by said hammer.

5. In combination, a source of power, a hammer operated from said source, a tool arranged to be engaged and operated by and power-transmitting mechanism interposed between said source and said tool for rotating said tool, said power-transmitting mechanism arranged to permit said tool to remain nonrotating while the latter is being acted upon by said hammer.

- 6. In combination, a source of power, a hammer operated from said source, a tool arranged to be engaged and operated bv said hammer, a collar encircling said tool, mechanism for continuously rotating said collar from said source of power, and means afiording a yielding frictional connection between said tool and said collar arranged relatively to the tool while the latter is being acted upon by said hammer.

7. Mechanism of the class described, comprising a source of power, a hammer op- ;erated from said source, a riveting tool arranged to be engaged and operated by said hammer, a collar encircling said tool, mechanism for continuously rotating said collar from said source of power, and means afiording a yielding frictional connection between said tool and collar arranged to permit said collar to momentarily slip relatively to the tool while the latter is being acted upon by said hammer.

8. In riveting machinery, the combination of a motor, a riveting tool driven by said motor, a plunger, means for reciprocating said plunger, a stop, a member engaging said plunger interposed between said plunger and said riveting tool, said member limited in its forward movement by said stop, and a spring engaging said I 'member to maintain it in its down position,

revent the into rigid said-member being adapted to riveting. tool from being force engagement with said plunger.

. 9. n riveting machinery, the combination of a motor, a riveting member driven by said motor, a plunger, means for reciprocating said plunger, and a floating thimble engaging said plunger for reventing the riveting member from bein orced into rigid engagement with said p unger.

10. In riveting machinery, the combination of a motor, a riveting member driven by said motor, a plunger, means for reciprocating said plunger, a stop, a floatin thimble engaging said plunger and limite in its forward movement by said stop, a spring engaging said thimble to maintain it in its down osition, saidfloatin thimble being adapted to prevent the riveting mem-' her from bein forced into a rigid engagement with sai plunger.

11. In a rivetlng'device, the combination of a rivet set, a reciprocating plunger for imparting blows to said rivet set, a spring for holding the plunger at one end of this movement, a rotating member for imparting blows to the plunger, said plunger being normally held out of the path of said rotating member, the rivet set being movable into the path of the plunger to a desired extent, a stop, a thimble engaging said plunger, and cooperating with said stop so as to prevent the rivet set from being forced into a rigid engagement with said plunger.

12. In riveting machinery, the combination of a motor, a riveting member driven by said motor, a plunger, mechanism driven by the motor for reciprocating said plunger comprising a rotating memb'er, said plunger being normally disposed out of the path of said rotating member, means for raising said plunger into the path of said rotating mem er when the riveting member is pressed upwardly, and a stop for limiting the movement ofsaid riveting member.

In witness whereof, I hereunto subscribe my name this 1 day of March, A. D. 1913.

MANETHO C. JACKSON. 

